I’ve got a skillion roof with no ceiling cavity, what options do I have for installing insulation?

I’ve got a skillion roof with no ceiling cavity, what options do I have for installing insulation?

Installing insulation in a skillion roof is similar to installing insulation in a wall and will noticeably reduce the amount of heat transferred through your skillion roof. Most people use wall insulation in skillion roofs as there is limited space. The most common products are R-2.5 or R-2.7 90mm high density wall batts or if there is enough space, two layers of R-2.0 75mm high density wall batts. The roof will have to be lifted for access.